/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

package org.apache.iotdb.db.it.query;

import org.apache.iotdb.it.env.EnvFactory;
import org.apache.iotdb.it.framework.IoTDBTestRunner;
import org.apache.iotdb.itbase.category.ClusterIT;
import org.apache.iotdb.itbase.category.LocalStandaloneIT;
import org.junit.AfterClass;
import org.junit.BeforeClass;
import org.junit.Test;
import org.junit.experimental.categories.Category;
import org.junit.runner.RunWith;

import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.fail;

@RunWith(IoTDBTestRunner.class)
@Category({LocalStandaloneIT.class, ClusterIT.class})
public class IoTDBSelectSchemaIT {
    private static String INSERTION_SQLS =
            "insert into root.sg.d1(time, s1, s2, s3) values (1, 1, 2, 3.0);";

    private static void createTimeSeries() {
        try (Connection connection = EnvFactory.getEnv().getConnection();
             Statement statement = connection.createStatement()) {
            statement.execute("CREATE DATABASE root.sg");
            statement.execute("CREATE TIMESERIES root.sg.d1.s1 with datatype=INT32,encoding=PLAIN");
            statement.execute("CREATE TIMESERIES root.sg.d1.s2 with datatype=INT64,encoding=PLAIN");
            statement.execute("CREATE TIMESERIES root.sg.d1.s3 with datatype=DOUBLE,encoding=PLAIN");
        } catch (SQLException throwable) {
            fail(throwable.getMessage());
        }
    }

    @BeforeClass
    public static void setUp() throws Exception {
        EnvFactory.getEnv().initBeforeClass();
        createTimeSeries();
        generateData();
    }

    private static void generateData() {
        try (Connection connection = EnvFactory.getEnv().getConnection();
             Statement statement = connection.createStatement()) {
            statement.execute(INSERTION_SQLS);
        } catch (SQLException throwable) {
            fail(throwable.getMessage());
        }
    }

    @AfterClass
    public static void tearDown() throws Exception {
        EnvFactory.getEnv().cleanAfterClass();
    }

    @Test
    public void testSchemaExpression() {
        String[] expressions = {
                "s1+s2",
                "-s1+s2",
                "-(s1+s3)",
                "!(s1>s2)",
                "-(-(s1))",
                "((s1+s2)*s3)",
                "-2+s1",
                "!true||s1>0",
                "-(-1)+s1",
                "sin(s1)+s1",
                "((s1+1)*2-1)%2+1.5+s2"
        };
        String[] completeExpressions = {
                "root.sg.d1.s1+root.sg.d1.s2",
                "-root.sg.d1.s1+root.sg.d1.s2",
                "-(root.sg.d1.s1+root.sg.d1.s3)",
                "!(root.sg.d1.s1>root.sg.d1.s2)",
                "-(-root.sg.d1.s1)",
                "(root.sg.d1.s1+root.sg.d1.s2)*root.sg.d1.s3",
                "-2+root.sg.d1.s1",
                "!true|root.sg.d1.s1>0",
                "-(-1)+root.sg.d1.s1",
                "sin(root.sg.d1.s1)+root.sg.d1.s1",
                "((root.sg.d1.s1+1)*2-1)%2+1.5+root.sg.d1.s2",
        };
        try (Connection connection = EnvFactory.getEnv().getConnection();
             Statement statement = connection.createStatement()) {
            ResultSet resultSet =
                    statement.executeQuery(
                            String.format(
                                    "select %s, %s, %s, %s, %s, %s, %s, %s, %s, %s, %s from root.sg.d1",
                                    expressions[0],
                                    expressions[1],
                                    expressions[2],
                                    expressions[3],
                                    expressions[4],
                                    expressions[5],
                                    expressions[6],
                                    expressions[7],
                                    expressions[8],
                                    expressions[9],
                                    expressions[10]));
            int columnCount = resultSet.getMetaData().getColumnCount();
            assertEquals(1 + expressions.length, columnCount);

            for (int i = 0; i < expressions.length; ++i) {
                assertEquals(
                        completeExpressions[i], resultSet.getMetaData().getColumnName(i + 2).replace(" ", ""));
            }
        } catch (SQLException throwable) {
            fail(throwable.getMessage());
        }
    }
}
